121243224123 has 24 divisors (see below), whose sum is σ = 200196124128. Its totient is φ = 69265026432.

The previous prime is 121243224079. The next prime is 121243224133. The reversal of 121243224123 is 321422342121.

121243224123 is a `hidden beast` number, since 1 + 2 + 1 + 243 + 2 + 2 + 412 + 3 = 666.

It is not a de Polignac number, because 121243224123 - 2⁹ = 121243223611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121243224133) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30415 + ... + 493367.

It is an arithmetic number, because the mean of its divisors is an integer number (8341505172).

Almost surely, 2^121243224123 is an apocalyptic number.

121243224123 is a deficient number, since it is larger than the sum of its proper divisors (78952900005).

121243224123 is a wasteful number, since it uses less digits than its factorization.

121243224123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467123 (or 467120 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 121243224123 its reverse (321422342121), we get a palindrome (442665566244).

The spelling of 121243224123 in words is "one hundred twenty-one billion, two hundred forty-three million, two hundred twenty-four thousand, one hundred twenty-three".